Grinder.



T. 'A. PANYARD. 30.?!

GRINDER.

APPLIOATIOH FILED 13110.8, 1909.

Patented Sept. 20, 1910.

.liZZZrzzg/S wannyfsh zs m, wAsmuaron o c W..;l MIATES PATENT OFFICE.

THOMAS A. PANYARD, F MILWAUKEE, WISCONSIN, ASSIGNOR TO EDWARD J. PURTELL, 0F MILWAUKEE, WISCONSIN.

GRINDER.

Specification of Letters Patent. Patented Sept; 20, 1910,

Application filed December 6, 1909.

Serial No. 531,533.

To all whom it may concern:

Be it known that I, THOMAS A. PANYARD, residing in Milwaukee, in the county of Milwaukee and State of WVisconsin, have invented new and useful Improvements in Grinders, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

This invention relates to improvements in grinders and more particularly to grinders which are adapted to be operated manually.

One of the objects of this invention is to provide a grinder which is simple in construction and efficient in operation and which is inexpensive to manufacture.

A further object of this invention is to provide a grinder with a universal tool rest which is adjustable to any angle desired and to either edge of the wheel to accommodate tools of different sizes and shapes.

A further object of the invention is to provide a grinder in which the grinding wheel is so connected to the spindle that it may be rotated in either direction without loosening from the spindle.

A further object of the invention is to provide a grinder in which the spindle and pinion are formed in one piece.

A further object of the invention is to provide a grinder in which the bearing of the spindle extends through and beyond the vertical center line of the grinding wheel to keep the weight of the wheel directly over the bearing.

With the above and other objects in view the invention consists of the grinder and its parts and combinations and all equivalents thereof.

In the accompanying drawing in which the same reference characters indicate the same parts in all of the views: Figure 1 is an end elevation of the complete grinder; Fig. 2 is a front view thereof; Fig. 3 is a vertical longitudinal sectional view of a por tion of the grinder; and, Fig. at is a front view of the grinder with the crank handle and part of the casing removed.

Referring to the drawing the numeral 5 indicates the combined main frame and casing of the grinder which is adapted to be clamped to a table top 6 or other support by means of a clamping screw 7 which is threaded to a lug 8 projecting from the inner half 9 of the casing and its upper capped end is adapted to impinge against the under side of the table or other support. Two lugs 10 projecting from the casing above the lug S are adapted to extend over the top of the support and serve as the stationary clamping jaws of the frame. The inner half 9 and the outer half 11 of the casing are connected together by means of screws 12 which extend through cars 13 projecting from the edges of each half of the casing and are threaded to the ears'of the inner half thereof. The inner engaging edges of the casingsections are ground to a perfect fit to form an oil tight joint so that the gears within the casing may run in oil or other lubricating substance. A gear wheel 14 rigidly connected to a short driving shaft 15 is positioned within the casing and the shaft extends through and has its bearing in the extension 16 forming part of the outer half of the casing.

A crank handle 17 having a slotted portion 18 extending to the shaft opening, is adjustably clamped to the shaft by means of an adjusting screw 19 which is adapted to draw the side portions of the handle together and reduce the diameter of the opening and clamp the handle to the shaft with the frictional engagement desired to provide for a slippage thereof when the tools being ground are pressed too firmly on the grinding wheel to prevent breaking of the gear teeth.

A spindle 20 having a pinion 21 formed integral therewith and in mesh with the gear wheel 14 is mounted in bearings 22 and 23 projecting from the inner and the outer half of the casing respectively. The outer portion of the spindle from the outer end of the pinion to the outer end thereof is of less diameter than the inner end which is of the same diameter as the pinion, and the shoulder 24 formed by the reduced diameter is positioned adjacent to the inner face of the outer half of the casing. A cotter pin 25 extends through the projecting end of the spindle to prevent longitudinal movement inwardly of the spindle. An annular shouldered cup -shaped grinding wheel holding member 26 is rigidly connected to the inner end of the spindle 20, preferably by a drive fit, and is adapted to prevent longitudinal movement outwardly of said spindle. A grinding wheel 27 of corundum or other abrasive material is supported on the member 26 and is clamped against the shoulder thereof by means of a collar 28 which surrounds the cup-shaped portion of the member 26 on the opposite side of the grinding wheel and is secured to the memher by screws 29. The bearing 22 extends into the cup-shaped portion of the member 26 to have the weight of the grinding wheel directly over the bearing and to also protect the end of the bearing from the particles worn from the grinding wheel. The outer surface of the bearing 23 is turned to accommodate a tool rest holder 30 which is in the form of a split collar having apertured ears 31 projecting tangentially therefrom. A11 eyed bolt 32 extends through the apertures of the ears and is adapted by means of its nut to adjustably clamp the holder to the bearing and the arm 33 of the tool rest 34 to the holder. The arm of the tool rest holder extends adjustably through the eye of the eyed bolt and forms the head of the bolt and in connection with the holder forms a universal joint which will permit the tool holder to be swung to either the peripheral side of the grinding wheel or adjusted to any angle desired.

The arm 33 is in the form of a round rod.

bent at right angles and extending into an opening 35 provided in the tool rest, the tool rest being adjustably connected thereto by a set screw 36 threaded in said rest and its inner end impinging against the arm. The tool rest is of angular form with one leg 37 of the angle adapted to lie adjacent to and alongside of the side of the wheel for the purpose of supporting scissors or similar tools to be ground.

An eyed lug 38 projecting from-the periphery of the inner half of the casing is provided to accommodate modified forms of tool rests or other attachments (not shown).

In use the universal adjustable feature of the tool rests provides for grinding tools at any angle desired and the handle connection serves as a means to prevent undue strain of the gear teeth. The weight of the grinding wheel is carried directly above the inner bearing and the end of the bearing extending into the cupshaped member is protected from the particles of corundum or other abrasive material worn ofi" the grinding wheel which would cause excessive wear of said bearing. The ground joint casing provides for filling said casing with oil or other lubricant so that the gears will constantly run in oil and thus subserve ease of operation and less wear.

lVhatI claim as my invention is- 1. A grinder, comprising a casing provided with means for clamping it to a support, a driving shaft journaled in the easing and provided with a gear, a spindle j ournaled in the casing and provided with a pinion in mesh with the gear, a grinding wheel mounted on the spindle, a tool rest positioned adjacent to the grinding wheel, a tool rest holder adjustably connected to the casing, and an L-shaped arm connected to the tool rest and adjustably connected to the tool rest holder.

2. A grinder, comprising a casing provided with means for clamping it to a support, a driving shaft journaled in the casing and provided with a gear, a spindle journaled in the casing and provided with a pinion in mesh with the gear, a grinding wheel mounted on the spindle, a tool rest positioned adjacent to the grinding wheel, a tool rest holder adjustably connected to the casing, and an L-shaped arm adjustably connected to both the tool rest and the tool rest holder.

3. A grinder, comprising a casing provided with means for clamping it to a support and with a projecting bearing, a driving shaft journaled in the casing and provided with a gear, a spindle journaled in the projecting bearing of the casing and provided with a pinion in mesh with the gear, a grinding wheel mounted on the spindle and extending over the projecting bearing, a tool rest positioned adjacent to the grinding wheel, a tool rest holder adjustably mounted on the casing and positioned concentrically with relation to the spindle, and an arm adjustably connected to both the tool rest and the tool rest holder.

4:. A grinder, comprising a casing pro vided with means for clamping it to a support, a driving shaft journaled in the casing and provided with a gear, an operating handle connected to and adapted to turn said shaft under normal strain and to turn independent of said shaft when said shaft is abnormally retarded, a spindle journaled in said casing and provided with a pinion formed integral therewith and in mesh with the gear, a grinding wheel mounted on the spindle, a tool rest positioned adjacent to the grinding wheel, a tool rest holder adjustably mounted on the casing and positioned concentrically with relation to the axis of the grinding wheel, and an arm adjustably connected to both the tool rest and the tool rest holder.

5. A grinder, comprising a frame provided with means for clamping it to a support and with projecting bearings, a driving shaft journaled in the frame and provided with a gear, a spindle journaled in the projecting bearings and provided with a pinion in mesh with the gear, a member rigidly connected to the spindle, a grinding wheel connected to the member and positioned to extend circumferentially over one of the projecting bearings, a tool rest positioned adjacent to the grinding wheel, a tool rest holder adjustably mounted on one of the projecting bearings concentrically with relation to the axis of the grinding wheel,

and an arm connected to the tool rest and adjustably connected to the tool rest holder.

6. A grinder, comprising a frame provided with means for clamping it to a. support and with projecting bearings, a driving shaft journaled in the frame and provided with a gear, a spindle journaled in the projecting bearings and provided with a pinion in mesh with the gear, a member rigidly connected to the spindle, a grinding wheel connected to the member and positioned to extend circumferentially over one of the projecting bearings, a tool rest positioned adjacent to the grinding wheel, a tool rest holder adjustably mounted on one of the projecting bearings concentrically with relation to the axis of the grinding wheel, an arm connected to the tool rest, and an eyed bolt for adjustably clamping the arm to the holder and the holder to the bearing in adjusted positions.

7. A grinder, comprising a frame provided with means for clamping it to a support and with projecting bearings, a driving shaft journaled in the frame and provided with a gear, a spindle journaled in the projecting bearings and provided with a pinion in mesh with the gear, a member rigidly connected to the spindle, a grinding wheel connected to the member and positioned to extend circumferentially over one of the projecting bearings, a tool rest positioned adjacent to the grinding wheel, a split collar mounted on one of the projecting bearings and having apertured ears projecting from the collar on each side of the split portion thereof, an arm connected to the tool rest, and an eyed bolt extending through the ears, and engaging the arm for clamping the arm to the holder and the holder to the bearing in adjusted positions.

8. A grinder, comprising a casing provided with means for clamping 1t to a support and with pro ectlng bearings, sald casing constructed to form an oil receptacle, a,

driving shaft 'journaled in the casing and provided with a gear positioned within the casing, a slotted operating handle clamped to the driving shaft and having a screw for adjusting the clamping engagement of the handle with the shaft to permit the slipping of said handle on said shaft when the gear is abnormally retarded, a spindle journaled in the projecting bearings and provided with a pinion in mesh with the gear, a cup-shaped shouldered member rigidly connected to the spindle, a grinding wheel connected to the member and bearing against the shoulder thereof and positioned to extend circumferentially over one of the projecting bearings, a clamping collar for clamping said grinding wheel to the cupshaped member, an angular tool rest positioned adjacent to the grinding wheel, a split collar mounted on one of the projecting bearings and having apertured ears projecting from the collar on each side of the split portion thereof, an angular arm adj ustably connected to the tool rest, and an eyed bolt extending through the apertures of the ears and the arm passing through the eye thereof for clamping the arm to the holder and the holder to the bearing in adjusted positions.

In testimony whereof, I affix my signature, in presence of two witnesses.

THOMAS A. PANYARD.

Witnesses:

C. H. Keener, ANNA SCI-IMIDTBAUER. 

